In the original
version of this story, I was completely clueless about Mega Man
and didn't realise the distinction between Mega Man and
Mega Man X (to say nothing of Mega Man Zero). I didn't
realise that Mega Man and X were two completely different
characters, so I just went ahead and used X sprites for Mega Man
(because they were cooler). In my first pass at remastering Eon's
World 1.0, I used an in-story justification for it, which is
still present in the opening dialogue between Mega Man (i.e. Rock)
and Doctor Light; Mega Man has undergone a major upgrade from some
new friends he's met.

Those familiar
with the Mega Man franchise will know that the X
series is set a hundred years after the classic one, and the Zero
series a further hundred years after that. This is something I came
to learn later and had to hurriedly come up with an explanation for
in the plot on page #203, by which point I'd started using Zero
and Battle Network sprites (again, because they were cooler),
thus creating a bit of a chronological mess. Needless to say, time
travel is involved.

Given how I fixed
the continuity problem later, I've opted to, instead of using X
sprites, go straight to Zero sprites for... well, Zero and
ZX Model X sprites for Mega Man. Yes, I know, once again, those
sprites are not meant to be Rock in the Mega Man ZX games,
but advanced tech from the future is involved in this story arc, and
the precise reasons for it will be revealed in time.

Finally, this
story arc was the original first appearance of Cream the Rabbit and
Cheese the Chao in Eon's World, prior to the remaster. Now,
of course, they've already played a major role in the recently concluded Blaze
the Cat story arc, and their new first appearance is
page #023.